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Installation Manual –Hardware Installation
BBU3806 WCDMA Base Band Unit
6.6 Installing Fiber
6.6.1 Introduction to Fiber
The fiber transmits high-speed CPRI signals between BBU and RRU.
There are four LC connectors with identifiers at both ends of the optical fiber
numbered as 1a/2a, 1b/2b, 1c/2c, and 1d/2d, as shown in Figure 6-4.
(1) LC connector
Figure 6-4 Outline of LC connector
6.6.2 Wiring Principles for Fiber
Route the fiber by following the principles below:
When unpacking fibers, you must check them with the packing list in terms of
type, model, and quantity. Classify the fibers by installation position to facilitate
future installation.
Before installation, check that there is no fold or impress on the fiber and that the
connectors are intact. Otherwise, replace it with a good one.
Before installation, check that the connectors of the fiber are clean. Otherwise,
clean the connectors with a piece of dust-free cotton cloth or a wiping box. For
more details, see Appendix D "Cleaning Optical Fiber Connectors".
During installation, do not pull the fiber too tense, jam on the fiber with height foot
or any other object, or lay the fiber on sharp objects.
If one end of the fiber connects to an optical device, never look straight at the
end face of the fiber connector. Otherwise, your eyesight might be affected.
When left unused, cover the connector with a protective cap.
Make sure the radius of any bent is 20 times larger than the diameter of the
cable.
Stuff the fiber inlet on the cabinet top with soft matters, for example, fireproof
cotton, to avoid possible damage to the fiber.
(1)
1a
1b
1c
1d
Huawei Technologies Proprietary
6-8
Chapter 6 Installing Cables
2a
2b
2c
2d
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